package com.webserver.core;
//ctrl+Alt+O  智能导包
import com.webserver.http.HttpServletRequest;
import com.webserver.http.HttpServletResponse;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * 实现多线程
 * 负责与连接的客户端进行HTTP交互
 * HTTP协议要求客户端与服务端采取一问一答的交互规则,并在交互完毕后断开TCP连接
 *
 * 因此,这里处理一次HTTP交互采取的过程分为三部分:
 * 1:解析请求(读取客户端发送过来的HTTP请求内容)
 * 2:处理请求(分析请求信息确定客户端意图,并进行对应的处理)
 * 3:发送响应(给浏览器发送一个HTTP中的响应,将处理结果回复给浏览器)
 */
public class ClientHandler implements Runnable{
    private Socket socket;
    public ClientHandler(Socket socket){
        this.socket = socket;
    }
    public void run() {
        try {
            // http://localhost:8088
            //1 解析请求 (实例化请求)
            //首先改为实例化HttpServletRequest完成解析请求(解析代码挪到HttpServletRequest的构造方法里)
            HttpServletRequest request=new HttpServletRequest(socket);
            HttpServletResponse response=new HttpServletResponse(socket);
            //2 处理请求
            String path = request.getUri();
            System.out.println("请求的抽象路径"+path);
            /*
                浏览器地址栏输入路径   http://localhost:8088+抽象路径
                path = 抽象路径
                测试网址 http://localhost:8088    无法处理:不能被访问,不能访问目录
                测试网址 http://localhost:8088/myweb/123.html  无法处理:找不到指定文件
                http://localhost:8088/myweb/classTable.html
                http://localhost:8088/myweb/index.html
             */
            //File file =new File("./webapps/myweb/classTable.html");
            File file =new File("./webapps"+path);

            if (file.isFile()){//请求的是一个存在的文件
                response.setStatusCode(200);
                response.setStatusReason("OK");
                response.setContentFile(file);
                //statusCode = 200;
                //statusReason = "OK";
            }
            else{
                response.setStatusCode(404);
                response.setStatusReason("Not Found");
                //statusCode = 404;
                //statusReason = "Not Found";
                file = new File("./webapps/root/404.html");
                response.setContentFile(file);
            }
                //3 发送响应
            response.response();


        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                //交互后与客户端断开连接(协议要求)
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
